Implementing lazy initialization
You're working on optimizing the startup time of a Java application. The team has identified that creating database connections eagerly is causing unnecessary delays. You need to implement lazy initialization for the Database class to improve startup performance.
This exercise is part of the course
Optimizing Code in Java
Exercise instructions
- Create a property
clientof typeDatabaseClient. - Lazily connect to our database.
- Return our database client only when connected.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
public class Main {
public static void main(String[] args) {}
}
class Database {
// Create a property for DatabaseClient
___
public DatabaseClient getClient() {
// Lazily connect to our database
if (___) {
client.connect("https//our-database.com");
}
// Return only when connected
return ___
}
}
// This class is simulating a real client connecting to a database
class DatabaseClient {
public void connect(String connectionUrl) {}
}